CN112142490A - 金属蜂窝陶瓷蓄热体 - Google Patents

金属蜂窝陶瓷蓄热体 Download PDF

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CN112142490A
CN112142490A CN202011030328.XA CN202011030328A CN112142490A CN 112142490 A CN112142490 A CN 112142490A CN 202011030328 A CN202011030328 A CN 202011030328A CN 112142490 A CN112142490 A CN 112142490A
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honeycomb ceramic
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朱立全
朱江
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Jiangxi Xinke Environment Protection Co ltd
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Abstract

本发明公开了金属蜂窝陶瓷蓄热体，包括以下重量份的原料：莫来石60～80份、刚玉20～30份、粘土10～15份、碳化硅5～7份、氧化铝30～40份、胶水30～40份、羟丙基甲基纤维素HPMC 5～10份、水22～35份、石墨烯5～7份。本发明制得的金属蜂窝陶瓷蓄热体的耐高温性、耐腐蚀性、显气孔率均高于国标要求，且明显优于对比例样品。因此，具有广阔的使用前景，通过引入了石墨烯，石墨烯可以进一步减少陶瓷材料的显气孔率，可以填充在氧化铝晶粒之间，并且石墨烯具有耐腐蚀性，可以提高金属蜂窝陶瓷蓄热体的蓄热性能，适合推广使用。

Description

金属蜂窝陶瓷蓄热体
技术领域
本发明涉及金属蜂窝陶瓷蓄热体技术领域，尤其涉及金属蜂窝陶瓷蓄热体。
背景技术
具有环保和节能双重功效的蓄热式热氧化器(RTO)是一种重要的废气污染控制设备，它能有效的处理有害的挥发性有机化合物(VOC)和危险性气体污染物(HAP)，被广泛用于石油化工过程以及各种使用有机溶剂的行业，如喷涂，印刷，金属除油和脱脂，胶结剂，制药，塑料，橡胶加工等行业排放废气的处理。蜂窝陶瓷蓄热体是蓄热式热氧化器(RTO)的核心部件。
目前使用的低膨胀蜂窝陶瓷蓄热体是疏松堇青石蜂窝陶瓷蓄热体，它的热膨胀系数小，抗热震性能好，受到广泛应用，但是它的显气孔率高，蓄热体显气孔率高，使用时它与废气的接触面积大，会受到一些酸性或碱性的废气的腐蚀，使蓄热体出现腐蚀粉化现象，耐压强度下降，严重时蓄热体会堵孔或碎裂。
为此，本发明提出金属蜂窝陶瓷蓄热体。
发明内容
本发明的目的是为了解决现有技术中存在的缺点，而提出的金属蜂窝陶瓷蓄热体。
为了实现上述目的，本发明采用了如下技术方案：
金属蜂窝陶瓷蓄热体，包括以下重量份的原料：莫来石60～80份、刚玉20～30份、粘土10～15份、碳化硅5～7份、氧化铝30～40份、胶水30～40份、羟丙基甲基纤维素HPMC 5～10份、水22～35份、石墨烯5～7份。
优选的，包括以下重量份的原料：莫来石60份、刚玉20份、粘土10份、碳化硅5份、氧化铝30份、胶水30份、羟丙基甲基纤维素HPMC 5份、水22份、石墨烯5份。
优选的，包括以下重量份的原料：莫来石70份、刚玉25份、粘土12份、碳化硅6份、氧化铝35份、胶水35份、羟丙基甲基纤维素HPMC 7份、水30份、石墨烯6份。
优选的，包括以下重量份的原料：莫来石80份、刚玉30份、粘土15份、碳化硅7份、氧化铝40份、胶水40份、羟丙基甲基纤维素HPMC 10份、水35份、石墨烯7份。
优选的，包括以下制备金属蜂窝陶瓷蓄热体的方法步骤，
S1：将莫来石、刚玉、粘土、碳化硅和氧化铝放入强力混料机内，以900-1200r/min转速，干法快速搅拌10～15min，得到混合物A；
S2：将胶水、羟丙基甲基纤维素HPMC和石墨烯放入强力混料机中，然后把转速降低到320-420r/min，并边搅拌边加水进行搅拌，使泥料均化成团，真空练泥3-5遍，泥段陈腐24-48h，二次真空练泥3-5遍，挤压成胚体；
S3：坯体放入微波炉中干燥定型；
S4：将定型后的坯体放入烘房，在110～120℃干燥；
S5：将干燥后的坯体进行端面加工，获得整齐的蜂窝端面；
S6：将加工好的完整蜂窝陶瓷坯体装入烧结炉，升温至1380～1480℃高温烧结，得到金属蜂窝陶瓷蓄热体。
优选的，所述S2中，将莫来石、刚玉、粘土、碳化硅和氧化铝放入强力混料机内，以1100r/min转速，干法快速搅拌12min，得到混合物A。
优选的，所述S2中，将胶水、羟丙基甲基纤维素HPMC和石墨烯放入强力混料机中，然后把转速降低到370r/min，并边搅拌边加水进行搅拌，使泥料均化成团，真空练泥4遍，泥段陈腐36h，二次真空练泥4遍，挤压成胚体。
优选的，所述S4中，将定型后的坯体放入烘房，在110～120℃干燥。
本发明的有益效果是：
(1)：本发明制得的金属蜂窝陶瓷蓄热体的耐高温性、耐腐蚀性、显气孔率均高于国标要求，且明显优于对比例样品。因此，具有广阔的使用前景；
(2)：本发明通过引入了碳化硅，碳化硅的引入，不但能够与氧化铝发生反应生成液相组份和第二相以及一定量低共熔相填充在氧化铝晶粒之间，从而减少陶瓷材料的显气孔率，还能诱导氧化铝晶粒长出片状，大大增强了晶粒的结合强度，剩下的碳化硅和可以起到颗粒弥散增强的作用，进一步减少陶瓷的显气孔率；
(3)：本发明通过引入了石墨烯，石墨烯可以进一步减少陶瓷材料的显气孔率，可以填充在氧化铝晶粒之间，并且石墨烯具有耐腐蚀性，可以提高金属蜂窝陶瓷蓄热体的蓄热性能，适合推广使用。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。
实施例一
本发明提出的金属蜂窝陶瓷蓄热体，包括以下重量份的原料：莫来石60份、刚玉20份、粘土10份、碳化硅5份、氧化铝30份、胶水30份、羟丙基甲基纤维素HPMC 5份、水22份、石墨烯5份。
本发明提出的金属蜂窝陶瓷蓄热体的制备方法，包括以下步骤，
S1：将莫来石、刚玉、粘土、碳化硅和氧化铝放入强力混料机内，以900r/min转速，干法快速搅拌10min，得到混合物A；
S2：将胶水、羟丙基甲基纤维素HPMC和石墨烯放入强力混料机中，然后把转速降低到320r/min，并边搅拌边加水进行搅拌，使泥料均化成团，真空练泥3遍，泥段陈腐24h，二次真空练泥3遍，挤压成胚体；
S3：坯体放入微波炉中干燥定型；
S4：将定型后的坯体放入烘房，在110℃干燥；
S5：将干燥后的坯体进行端面加工，获得整齐的蜂窝端面；
S6：将加工好的完整蜂窝陶瓷坯体装入烧结炉，升温至1380℃高温烧结，得到金属蜂窝陶瓷蓄热体。
实施例二
本发明提出的金属蜂窝陶瓷蓄热体，包括以下重量份的原料：莫来石70份、刚玉25份、粘土12份、碳化硅6份、氧化铝35份、胶水35份、羟丙基甲基纤维素HPMC 7份、水30份、石墨烯6份。
本发明提出的金属蜂窝陶瓷蓄热体的制备方法，包括以下步骤，
S1：将莫来石、刚玉、粘土、碳化硅和氧化铝放入强力混料机内，以1100r/min转速，干法快速搅拌12min，得到混合物A；
S2：将胶水、羟丙基甲基纤维素HPMC和石墨烯放入强力混料机中，然后把转速降低到370r/min，并边搅拌边加水进行搅拌，使泥料均化成团，真空练泥4遍，泥段陈腐36h，二次真空练泥4遍，挤压成胚体；
S3：坯体放入微波炉中干燥定型；
S4：将定型后的坯体放入烘房，在115℃干燥；
S5：将干燥后的坯体进行端面加工，获得整齐的蜂窝端面；
S6：将加工好的完整蜂窝陶瓷坯体装入烧结炉，升温至1420℃高温烧结，得到金属蜂窝陶瓷蓄热体。
实施例三
本发明提出的金属蜂窝陶瓷蓄热体，包括以下重量份的原料：莫来石80份、刚玉30份、粘土15份、碳化硅7份、氧化铝40份、胶水40份、羟丙基甲基纤维素HPMC 10份、水35份、石墨烯7份。
本发明提出的金属蜂窝陶瓷蓄热体的制备方法，包括以下步骤，
S1：将莫来石、刚玉、粘土、碳化硅和氧化铝放入强力混料机内，以1200r/min转速，干法快速搅拌15min，得到混合物A；
S2：将胶水、羟丙基甲基纤维素HPMC和石墨烯放入强力混料机中，然后把转速降低到420r/min，并边搅拌边加水进行搅拌，使泥料均化成团，真空练泥5遍，泥段陈腐48h，二次真空练泥5遍，挤压成胚体；
S3：坯体放入微波炉中干燥定型；
S4：将定型后的坯体放入烘房，在120℃干燥；
S5：将干燥后的坯体进行端面加工，获得整齐的蜂窝端面；
S6：将加工好的完整蜂窝陶瓷坯体装入烧结炉，升温至1480℃高温烧结，得到金属蜂窝陶瓷蓄热体。
对实施例1-实施例3和对比组1-2制备得到的金属蜂窝陶瓷蓄热体进行性能检测；具体的测试结果见下表数据：
Figure BDA0002703483250000051
Figure BDA0002703483250000061
通过上述表格数据可知，本发明制得的金属蜂窝陶瓷蓄热体的耐高温性、耐腐蚀性、显气孔率均高于国标要求，且明显优于对比例样品。因此，具有广阔的使用前景，本发明引入了碳化硅，碳化硅的引入，不但能够与氧化铝发生反应生成液相组份和第二相以及一定量低共熔相填充在氧化铝晶粒之间，从而减少陶瓷材料的显气孔率，还能诱导氧化铝晶粒长出片状，大大增强了晶粒的结合强度，剩下的碳化硅和可以起到颗粒弥散增强的作用，进一步减少陶瓷的显气孔率，还引入了石墨烯，石墨烯可以进一步减少陶瓷材料的显气孔率，可以填充在氧化铝晶粒之间，并且石墨烯具有耐腐蚀性，可以提高金属蜂窝陶瓷蓄热体的蓄热性能，适合推广使用。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。

Claims (8)

1.金属蜂窝陶瓷蓄热体，其特征在于，包括以下重量份的原料：莫来石60～80份、刚玉20～30份、粘土10～15份、碳化硅5～7份、氧化铝30～40份、胶水30～40份、羟丙基甲基纤维素HPMC 5～10份、水22～35份、石墨烯5～7份。
2.根据权利要求1所述的金属蜂窝陶瓷蓄热体，其特征在于，包括以下重量份的原料：莫来石60份、刚玉20份、粘土10份、碳化硅5份、氧化铝30份、胶水30份、羟丙基甲基纤维素HPMC 5份、水22份、石墨烯5份。
3.根据权利要求1所述的金属蜂窝陶瓷蓄热体，其特征在于，包括以下重量份的原料：莫来石70份、刚玉25份、粘土12份、碳化硅6份、氧化铝35份、胶水35份、羟丙基甲基纤维素HPMC 7份、水30份、石墨烯6份。
4.根据权利要求1所述的金属蜂窝陶瓷蓄热体，其特征在于，包括以下重量份的原料：莫来石80份、刚玉30份、粘土15份、碳化硅7份、氧化铝40份、胶水40份、羟丙基甲基纤维素HPMC 10份、水35份、石墨烯7份。
5.根据权利要求1所述的金属蜂窝陶瓷蓄热体，其特征在于，包括以下制备金属蜂窝陶瓷蓄热体的方法步骤，
S1：将莫来石、刚玉、粘土、碳化硅和氧化铝放入强力混料机内，以900-1200r/min转速，干法快速搅拌10～15min，得到混合物A；
S2：将胶水、羟丙基甲基纤维素HPMC和石墨烯放入强力混料机中，然后把转速降低到320-420r/min，并边搅拌边加水进行搅拌，使泥料均化成团，真空练泥3-5遍，泥段陈腐24-48h，二次真空练泥3-5遍，挤压成胚体；
S3：坯体放入微波炉中干燥定型；
S4：将定型后的坯体放入烘房，在110～120℃干燥；
S5：将干燥后的坯体进行端面加工，获得整齐的蜂窝端面；
S6：将加工好的完整蜂窝陶瓷坯体装入烧结炉，升温至1380～1480℃高温烧结，得到金属蜂窝陶瓷蓄热体。
6.根据权利要求5所述的金属蜂窝陶瓷蓄热体的制备方法，其特征在于，所述S2中，将莫来石、刚玉、粘土、碳化硅和氧化铝放入强力混料机内，以1100r/min转速，干法快速搅拌12min，得到混合物A。
7.根据权利要求6所述的金属蜂窝陶瓷蓄热体的制备方法，其特征在于，所述S2中，将胶水、羟丙基甲基纤维素HPMC和石墨烯放入强力混料机中，然后把转速降低到370r/min，并边搅拌边加水进行搅拌，使泥料均化成团，真空练泥4遍，泥段陈腐36h，二次真空练泥4遍，挤压成胚体。
8.根据权利要求7所述的金属蜂窝陶瓷蓄热体的制备方法，其特征在于，所述S4中，将定型后的坯体放入烘房，在115℃干燥。
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